Flashcards in Solids, liquids and gases Deck (33):
What is the process called from solid to liquid?
What is the process called from liquid to solid?
What is the process called from liquid to gas?
What is the process called from gas to liquid?
What is the process called from gas to solid?
What is the process called from solid to gas?
How would you describe a gas?
rapid, random, big spaces - most kinetic energy - they exert themselves onto the walls of their container and collide with the walls.
How would you describe a solid?
regular arrangement, vibrating - least kinetic energy
How would you describe a liquid?
still touching, can move around other
When kinetic energy is added to a solid, liquid and a gas what happens to the temperature?
When kinetic energy is added to a solid, liquids and a gas what happens to the particles?
They gain kinetic energy
What happens when a substance is melting?
Heat energy is used to break bonds between molecules.
What happens when a substance is boiling?
Heat energy is used to overcome attractive forces
What is the formula for density?
density = mass divided by volume
What is the formula for volume of a cuboid?
volume = width x length x height
What is the formula for pressure?
pressure = force divided by area
At any point in a solid, liquid or gas which direction does the particles act?
equally in all directions
What is the formula for pressure at different depths in liquids?
pressure = density x height x gravity. field strength
What is the absolute temperature proportional to?
to the average kinetic energy of the particles in a substance
since gas particles exert a force on the walls of the container, they also exert pressure os how would you work out the pressure?
pressure = force divided by area
What is absolute zero equal to?
-273 degrees celsius
How do you go from degrees celsius to kelvins and the other way around?
degrees celsius = K - 273 K = degrees celsius + 273
What temp is absolute zero?
What is absolute zero?
Where the particles stop moving and there is no pressure.
In a fixed volume if you increase the temperature what happens to the temperature?
it increases due to increased speed of collision and hence increased force or increase rate/ frequency of collision.
If you double the temp in kelvins what happens to the pressure ?
What is the formula for doubling temp in kelvins and doubling the pressure?
P1 x T2 = P2 x T2 or P1 dived by T1 = P2 divided by T2
For a fixed temperature, what happens when you halve the volume of the container?
It doubles the rate of collision and doubles the pressure.
What is the formula for Boyle's law?
P1 x V1 = P2 x V2 or P1 = (P2 x V2) divided by V1 or P2 = (P2 x V2) divided by P1
What is the formula for the change in thermal energy?
change in thermal energy = mass x specific heat capacity x change in temp.
What is the difference between accuracy and precision?
Precision = an indication of the smallest increment that can be measured on an instruments scale. and Accuracy = an indication of how close a measurement is to it's actual value (for a given level of precision)
Describe an experiment where the temperature remains constant during changes of state.
- Put ice in a test tube with a thermometer and measure the temperature every 2 minutes until it's melted.